CHAPTER 5: SETTINGS MONITORING ELEMENTSF60 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5-3035NEUTRAL WIRE OPEN 1 DETECTION — Enables and disables the VT neutral wire open detection function. When the VT isconnected in Delta, do not enable this function because there is no neutral wire for Delta connected VT.NEUTRAL WIRE OPEN 1 3 HRAM PKP — Specifies the pickup level of 3rd harmonic of 3V0 signal for the NEUTRAL WIRE OPENDETECTION logic to pick up.Base voltage for this element is PHASE VT SECONDARY setting in the case of WYE VTs and (PHASE VT SECONDARY)/ in caseof DELTA VTs. The setting is found under SETTINGS SYSTEM SETUP AC INPUTS VOLTAGE BANK PHASE VT SECONDARY.Figure 5-166: VT fuse fail logic5.9.0.9 Thermal overload protection (ANSI 49)SETTINGS CONTROL ELEMENTS MONITORING ELEMENTS THERMAL OVERLOAD PROTECTION THERMAL PROTECTION 1(2) THERMAL PROTECTION 1 THERMAL PROTECTION 1FUNCTION: DisabledRange: Disabled, Enabled THERMAL PROTECTION 1SOURCE: SRC1Range: SRC 1, SRC 2, SRC 3, SRC 4 THERMAL PROTECTION 1BASE CURR: 0.80 puRange: 0.20 to 3.00 pu in steps of 0.01 THERMAL PROTECTION 1k FACTOR: 1.10Range: 1.00 to 1.20 in steps of 0.05
